How to use a Must-Use plugin to hide a regular one and to hide itself?

2 comments

1. Apparently, there’s no way to remove one plugin from the Must-Use list…

   But then, found a filter that does even better:
   show_advanced_plugins will completely hide the sight of the Must-Use plugins.

   After all, if you’re trying to hide something of this nature, then hide it all…

   It’s inside the class WP_Plugins_List_Table and takes two arguments: a boolean and the plugin type (mustuse and dropins).

   Check this article for a reference of MU and specially Drop-ins. But, for the sake of the wiki, I’ll post the DI table at the end of this answer.

   ---

   Update:
   – mu-plugin updated to multiple users and multiple hide plugins ^{was string now it’s array}

   ---

   The Drop-in plugin

   For testing this procedure we need one of those. Create a file named db.php at the root of your wp-content folder and copy this:

   <?php
   /*
       Plugin Name: Just for testing Drop-ins
       Version: 0.1
       Author: WPSE-53866
       Author URI: http://wordpress.stackexchange.com/
   */
   

   ---

   The Must-use plugin

   Then, this one inside the mu-plugins folder, and set the parameters of the class.

   <?php
   /*
   Plugin Name: Hide Must-Use and Drop-ins from the Plugins listing
   Plugin URI: http://wordpress.stackexchange.com/questions/53866
   Description: Used to hide the Must-Use and Drop-ins plugins from all users except one. Also can hide a selected plugin from the regular list, be it active or not.
   Version: 1.1
   Author: brasofilo
   AuthorURI: http://wordpress.stackexchange.com/users/12615/
   */
   
   /**
    * Parameters of the class - sorry for the non-standard documentation
    *
    * @super_admin     : array   (required)    : the users which are able to see everything
    * @can_see_mustuse : boolean (required)    : can other users see the Must-Use list?
    * @can_see_dropins : boolean (required)    : can other users see the Drop-ins list?
    * @hide_this_one   : array   (optional)    : plugins to hide in the regular listing
    *
    * Reference article for Must-Use and Drop-ins
    * http://hakre.wordpress.com/2010/05/01/must-use-and-drop-ins-plugins/
    */
   
   add_action('admin_init', 'wpse_53866_fire_plugin');
   
   function wpse_53866_fire_plugin() 
   {
       global $pagenow;
       if( 'plugins.php' != $pagenow) 
           return;
   
       $wpse53866_HideAdvancedPlugins_instance = new Wpse53866_HideAdvancedPlugins(
           array(
               'super_admin'       => array('Rodolfo','roda'),
               'can_see_mustuse'   => false,
               'can_see_dropins'   => true,
               'hide_this_ones'    => array( 'set-user-locale.php', 'akismet/akismet.php' )
           )
       );
   }
   
   class Wpse53866_HideAdvancedPlugins
   {
       public function __construct($data)
       {       
           $this->user     = $data['super_admin'];
           $this->mustuse  = $data['can_see_mustuse'];
           $this->dropins  = $data['can_see_dropins'];
           $this->hide     = isset( $data['hide_this_ones'] ) ? $data['hide_this_ones'] : false;
   
           if($this->hide)
               add_filter( 'all_plugins', array(&$this, 'on_list_plugins' ) );
   
           add_filter( 'show_advanced_plugins', array(&$this, 'on_list_advanced' ), 10, 2 );
       }
   
       public function on_list_plugins($plugins)
       {
               global $current_user;
   
               if( ! in_array( $current_user->user_login, $this->user ) )
               {
                   foreach( $this->hide as $plug )
                       unset( $plugins[$plug] );               
               }
   
              return $plugins;
       }
   
       public function on_list_advanced($show, $type)
       {
               global $current_user;
   
               if( ! in_array( $current_user->user_login, $this->user ) ) 
               {
                   if( 'mustuse' == $type ) 
                       return $this->mustuse;
   
                   if( 'dropins' == $type ) 
                       return $this->dropins;
               }
   
              return true;
       }
   }
   

   ---

   Reference

   by hakre on wordpress

   

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2. Another use: in a Multisite environment, suppose that we have a site specific plugin. Not a Must Use, but a regular plugin, tailor made for just one site.

   It lives on example.com/wp-content/plugins/my-plugin/my-plugin.php.

   We’ll make a Must Use plugin, /mu-plugins/hide-plugins.php like:

   <?php
   /**
    * Plugin Name: One site only
    * Description: Hide site specific plugin from other sites
    **/
   
   add_action('plugins_loaded', function () 
   {
       # Set filter to all sites, except ID 15
       $blog_id = get_current_blog_id();
       if( $blog_id == 15 )
           return;
   
       # Alternative for subdomain installs
       // if( 'example.com' !== $_SERVER['SERVER_NAME'] )
   
       add_filter( 'all_plugins', function( $plugins )
       {
           unset( $plugins['my-plugin/my-plugin.php'] ); 
           return $plugins;
       });
   });
   

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